Key result
Collision of excitation waves in the dog Purkinje system produced a distinctive uniphasic and positive extracellular wave form, with collision sites shifting based on the pacemaker site.
The study characterizes the electrophysiological signatures of excitation wave collisions in the canine Purkinje system, demonstrating distinctive extracellular waveforms and shifting collision sites.
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No immediate clinical guidance from canine data; leaves open whether collision waveforms can guide human Purkinje mapping or ablation.
Spach et al. (1971) studied Ventricular conduction system of the dog. Pacing electrodes at opposite ends of a functionally single strand was evaluated on Collision of excitation waves and associated extracellular/intracellular potential changes. Collision of excitation waves in the dog Purkinje system produced a distinctive uniphasic and positive extracellular wave form, with collision sites shifting based on the pacemaker site.
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